Question
Perry took 2 hours to walk from Building H to Building J which was 10 km away. On his way back from Building J to Building H, he increased his average walking speed by 1 km/h. How long did he take for his journey back?
3 m

Click button first when a symbol is required. X

Perry took 2 hours to walk from Building H to Building J which was 10 km away. On his way back from Building J to Building H, he increased his average walking speed by 1 km/h. How long did he take for his journey back?